Riverside County opens vaccination slots to those 16 and older Riverside County is expanding the list of people who are eligible to receive the COVID-19 vaccination, opening it up to everyone 16 and older starting tomorrow April 6th. “I am ecstatic in my profession flight attendant being around all these people, who are still flying when they probably shouldn’t be unless they are fully vaccinated," said Michael Martinek, who's fully vaccinated. "I was a little nervous.” For Michael Martinek, it was quick, painless and easy to get his second COVID-19 shot. “I didn’t have a problem once we became eligible it was pretty easy, and simple to make my appointment," said Martinek.